<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    div {
      width: 200px;
      height: 200px;
      padding: 50px;
      border: 20px solid #ccc;
    }
    .one {
      background-color: antiquewhite;
    }
    .two {
      box-sizing: padding-box;
      background-color: aqua;
    }
    .three {
      box-sizing: border-box;
      background-color: aquamarine;
    }
  </style>
</head>
<body>
  <div class="one"></div>
  <div class="two"></div>
  <div class="three"></div>
</body>
</html>